Defense Technology Institute , AU Sarajevo, Sarajevo, Bosnia and Herzegovina
University of Zenica, Zenica, Bosnia and Herzegovina
Faculty of mechanical engineering, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
The paper describes the microstructural examination of a joint of the base material, austenitic stainless steel with intermetallic strengthening classified according to its chemical composition and properties according to standard SAE AMS 5528 and metallic coating marked as NiCrAlY 4516 according to manufacturer catalog, Sulzer Metco. Coating is applied using HVOF Diamond Jet procedure. Basic material together with applied coating is designed to operate at elevated temperatures. By testing with optical and scanning electron microscopy, it was found that at the joint is present aluminium oxide with the presence of yttrium oxide, which play a significant role in the prevention of high-temperature oxidation of the base material. At the joint are also analyzed and the concentration changes in the content of alloying elements.
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